著者

山名 正夫

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空学会誌 (ISSN:00214663)

巻号頁・発行日

vol.14, no.149, pp.170-176, 1966-06-05 (Released:2009-07-09)

参考文献数

8

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The phenomenon of "Hitodama", a fairly popular term from ancient in Japan and probably corresponding to will-o'-the-wisp, is studied from the viewpoint of combustion of gases. The viewpoint has come out of the examination on nearly 100 actual examples mostly observed by the acquaintances of the author. An experimental simulation is tried in a wind-tunnel, in which the setup is so devised that the mixing of methane and surrounding air is caused merely by interdiffusion. A long, horizontal column of methaneair mixture thus formed is ignited to establish a propagating flame. The observed flames take three representative types; long one with a ringshaped head, one with a conically-grooved head, and spherical one with a short tail, according to the concentration profile in the column. The analytical investigation gives calculated shapes of methane flames which are in a fairly good agreement with observed ones.

著者

山名正夫, 中口博 共著

出版者

養賢堂

巻号頁・発行日

1968

著者

山名 正夫

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空学会誌 (ISSN:00214663)

巻号頁・発行日

vol.2, no.6, pp.108-112, 1954-03-31 (Released:2009-07-09)

参考文献数

3

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Some of the wartime Japanese navy planes at their experimental stages were easily brought into accidental (or unintentional) autorotation in acrobatic flight such as vertical turn or loop. The analytical studies, refining procedures taken against these defects and design precautions are described here.When the wing is liable to stall at its tip or at the approximate middle portion between tip and root, and when the directional stability is not sufficient under large incidence angles, the accidental autorotation will happen due to small side slip angle ψ or angular velocity r around Z axis caused by a slight and unavoidable incoordination of control. The procedures are indicated in Fig. 5.Consequently it is summarized: that the stall of main wing should grow gradually outward from root and forward from trailing edge as indicated in the right half of Fig. 6 (a), that the value of ∂Cn/∂ψ should not decrease even under large incidence angles.

著者

山名正夫著

出版者

朝日新聞社

巻号頁・発行日

1972

著者

菊原 静男 鈴木 正一 土井 武夫 内藤 子生 疋田 遼太郎 堀越 二郎 松平 精 山名 正夫

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空学会誌 (ISSN:00214663)

巻号頁・発行日

vol.7, no.65, pp.164-172, 1959-06-28 (Released:2009-07-09)

著者

山名 正夫

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空学会誌 (ISSN:00214663)

巻号頁・発行日

vol.14, no.149, pp.170-176, 1966

---

The phenomenon of "Hitodama", a fairly popular term from ancient in Japan and probably corresponding to will-o'-the-wisp, is studied from the viewpoint of combustion of gases. The viewpoint has come out of the examination on nearly 100 actual examples mostly observed by the acquaintances of the author. An experimental simulation is tried in a wind-tunnel, in which the setup is so devised that the mixing of methane and surrounding air is caused merely by interdiffusion. A long, horizontal column of methaneair mixture thus formed is ignited to establish a propagating flame. The observed flames take three representative types; long one with a ringshaped head, one with a conically-grooved head, and spherical one with a short tail, according to the concentration profile in the column. The analytical investigation gives calculated shapes of methane flames which are in a fairly good agreement with observed ones.

著者

山名 正夫 伊藤 光

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会誌 (ISSN:00214663)

巻号頁・発行日

vol.23, no.255, pp.251-257, 1975-04-05 (Released:2009-05-25)

参考文献数

2

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The generation of a kind of circulatory flow in the separated-flow region of a stalled sweptback wing was noticed. Observation on the circulatory flow was made for a model airplane by using evaported-gas-oil smoke. The presence of a strong lateral outward flow was observed in the considerable range behind the trailing edge of wing-root portions. The effect of the angle of sweep back and taper ratio of a wing on the intensity and direction of the circulatory flow were also investigated.

著者

山名 正夫 山本 晴之 堀内 武夫 笹島 豊之介

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空學會誌 (ISSN:18835422)

巻号頁・発行日

vol.5, no.40, pp.771-778, 1938-08-05 (Released:2009-07-09)

著者

故山名 正夫 伊藤 光

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会誌 (ISSN:00214663)

巻号頁・発行日

vol.25, no.279, pp.201-207, 1977-04-05 (Released:2009-05-25)

参考文献数

5

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Experimental studies for determining the profiles of the wing sections with high maximum lift coefficient is described. Observation of flow around the wing sections and measurement of section lift coefficient are carried out in a twodimensional smoke wind-tunnel. Transition in the boundary layer along the wing surfaces is also observed by using evaporated-gas-oil smoke. Additionally, the wing sections with extended trailing-edge are investigated. Maximum lift coefficient up to 2.28 is obtained at Reynolds number of 5.34×105.